Improved lathe-chuck



J. RICH.

Lathe Chuck.

o 07,291 Paentec! Sept. 13, 1870.

@ #Invair/for N. PETERS. Pnaxuumugmpher. wnhingwn, D.C.

tuitrd Sttte )attent @filtre-.

JOHN RICH, OF PAI'NESVILLE, OHIO.

letters Pateato. 107,291,1Iated September -1 3, 1870.

IMPROVED LATHE-CHUCK.

The Schedule referred to in these Letters Patent and making p art of the same v temporarily until the center is found, when it is se'- eured permanently by the clips. The object ot' the springs is to counteract the tendency of' the article to slip off of the center after it is found, the elasticityot' the coiled springs holding the article sufficiently firm untilit is secured to thc tace-plate bycthe clips; also, the springs will stretch vor contract sufficiently to allow articles of different thicknesses to be secured to thc plate without movingthe collar up ou the shaft while at work. This is useful in centering for turning out spring seats in wateh-cylimlers, or any work ci that class; the center is found by 'placing the article on the face-plato, hooking the spring-hooks over the edge, then revolving the chuck and pressing any soft substance against its edge until itl runs perfectly -t-rue; then the points of the clips are placed oirtlie edge 4of the article and secured firmly by the nuts.

The novelty of this improvement is iu using the hooked springs to hold the article until tire center is found. When necessary, the collar can. he slipped up on theshaft and secured in position by the set-screw,

Figure I is a view of the chuck complete in all its parts, ot' which A is the faccfplate; B, opening'iu the plate; O O, ciips; D, shaft; 1G E, nuts; F E, bolts; G, collar; a e, coiled springs; I) b, hooks on free ends of springs; c c, guide-pins; d, set-screw.

Figure 1I view of collar G, coiled springs'a u-,with the hooks 11 b on their free ends.

A is disk of met-al, secured ou the end of the shafti); said disk has a slot or opening, B, eut through its face to allow the entrance of any projection that may be attached to. or project from the article to be acted on; said slot is extended down through the shaft D.

au are long coiled springs,.which lie parallel to the length of the shaft D. The hooked ends b b of the springs pass through the openingr sufficiently far ,to grasp the edge of the article to be acted on.

C'C- are clips, which secure the article permanent-l y after the center is found. The clips slideiuward or ontward, guided by the slots e e, to accommodate the differentdialneters of the articles. After the clips are passed over the edge of the article, they are secured by the nuts E E.

F l are the bolts, which are headed into the clips, i.

and are guided in the slots ce.

G is a collar, which fits round the shaft D with the springs secured to its sides.

d is a set-screw, that secures the collar at any point cu the shaft.

ce are pins, which a ct as guides. rlhe collar` is divided ou one side, which forms the slot f. The guidepins c c work in the slot f, keeping the springs a a parallel to the line of the shaft D.

WhatI claim as my invention, and desire to'secure by Letters Patent, is

'lhc collar G and elastic coiled springs aa, with their hooked ends I) l), in combination with the chuck, substantially as and for the purpose as hereinbefore set forth.

JOHN RICH.

Witnesses:

J AMES E. CHAMBERS, WILLIAM WADsWoRTH. 

